My '99 R11GS was being a real pain to start. If I did get it started it would run very rough at low rpm then rev like crazy over 3500 rpm or so. After a some searching I finally found Afrodog's post describing similar symptoms and a solution, BMW R1100 Help
Leaky quick disconnect were the likely cause of my trouble so I'm upgrading from plastic QD to brass. Also going to replace fuel lines, filter, screen and fuel pump (existing one has whined like crazy since I've had the bike).
Lots of threads describing boxer fuels systems, these helped me:
Parts ordered from beemerboneyard.com:
Here is a link to EnDuraLast FP-231 Kit Installation Guidelines
if the embedded one doesn't work below.
Step #2 remove fuel tank. Fuel spider before.
Most shots of the mounting plate are like the one above, I took this one to show where it is in relation to the rest of the tank.
#6 remove bracket from tank.
#7 remove fuel pump hose. Pretty much destroyed all the crimp hose clamps, good thing beemerbonyard included plent of replacements.
#8 note the polarity of the original connections. This model is brown negative and green positive/
#11 .25" spade on positive and .187" space on negative. They included crimp connectors that I soldered on.
#12 thru 18 install pump, install filter, install screen.
The new brass quick disconnects are made by CPC, same mfg as original plastic ones and are the same size. Cut the new fuel line to the same lengths as the old and replace.
#19 stuff in hole!
Other half of QD's on bike.
Step #23 Test!
Mounted the tank, added some gas and pressed the start button. She cranked maybe three times and fired right up, smooth as silk.
The new pump is much quieter too!
When I was flipping the tank around getting gas out of it and positioning it, something was rattling around in there. I pulled this thing out when the fuel spider plate was off. What is it?
Looks like a knozzle?